Another total-body exercise (are you seeing a pattern here yet?), mountain climbers get your heart racing, your legs pumping and your upper body firing on all cylinders — at the same time! They are a popular addition to boot camp-style classes.
“Mountain climbers are a killer exercise that challenges your balance, agility, proprioception (an aspect of balance) and coordination,” says Teri Jory, certified trainer and founder of POISE Productions Fitness Technique. “They fire up nearly every muscle group in the body, including deltoids, biceps, triceps, chest, obliques, abdominals, quadriceps, hamstrings and hip abductors.” Use time, not repetitions, as you build endurance. See how many you can do in 60 seconds, and try to increase your reps each day.